Thanks for the advice on the rattle gun. It has been noted.

Their is no key on the shaft, the blade to the best of my knowledge is held on by clamping pressure only. Concave washers are present on each site of the blade I am assuming to ensure the blade plate doesnt come loose, quite similar to the victa blade plate washer concept I think. Happy to be told otherwise if thats not the case. I am sure Grumpy will clarify.

Joe, since purchasing the rattle gun I have used it for a number of jobs. It makes my compressor work hard thats for sure.

Cheers
Jaffa